Continuous strap for guarding drill shafts



May 4 1926.

L; L.- sC-HAUER- 'CONTINUOUS STRAP ROR GUARDING DRILL SHAFTS Filed Feb. 10

Patented May 4, 1926.

L UNITED# 'Sie *ES PATENT? ,QFETCEffE i LAWRENCE LEE scimmia, or CINCINNATI, joIiIQ, iissIeNon 'ro T'Iiii CINCINNATI i 1 BICKIORD moon CQIIPANY, or CINCINNATI, omo,nCoinzoaiimronoromo.

kCoN'rINiIoUsstraal? ron eUAaDINaDaItIsHAFrs.

.l Application filed yIiebruary To all 107mm t may concern: v

Be itl known Vthat l, LAWRENCE man SCirAUnR, a citizen of the United States,`and.

residing at Cincinnati, inthe'. county of Hamilton and State of Chim/have invented new and `liiiprovedj Continuous Straps for Guarding Drill Shafts,of which thefollowing specification isa fulldisolosure.`

'lliis invention deals with the covering of the' rotating shaftsb'on a 4drillingmachine to protect the operator of the machine against injury and Concerns chieiiythe en V'closing 'of the. rotating Vshafts on a' radial' drilling vvmachine. l I l In a radial. `drilling machine, the drill head, which is carried by and movable along theyiadialarm,` is connected through Ya slot in the arm to an arm shaft located Awithin Ythe arm. The slotfin the radial arm serves to take care of thefconnecting means between thedrillfhead and thearm shaft ydui'- ing the movement f ofthe head along the arm., l:One feature lof my invention is to maintain the slot fin the arm Coveredduring' the movement of the drill head.

YThe radial arm of Vthedrill vis movable inA a vertica-ldirection and during the vertical vmovement ofthe arm, the arm shaft is maintainedin operative Looniiectioi'i with a vvertical driving shaft.Vv The vertical driving shaft is left completely exposed in' many.

` cases-which is undesirable from the standing'to take care of point of safetyto` the operator ofthe machineJV Another feature of my invention is to maintain the vertic'aldriving` shaft completely enclosed during the operation of the drilling machine and irrespective of thefvertical movement of the radial arm.

Preferably, in a radial drill'ng machine constructed in accordance vvithmy inven tion, a vertical driving shaft is enclosed in a Acasing mounted on the vmember'v which supports the radial arm. tis necessary, however, toform a vertical sl'ot'in' the casthe connection between the arm shaft and the vertical driving shaft during the vertical movement of the radial arm. bTheislot thus .formed inthe casing leaves the vertical drive shaft unenclosed von one side thereof. My invention includes` provision for rcovering the slot in the casing and also for covering'the slot in the radial arm by a single fleXible' strip, The strip is secured to opposite ends of the slotin the 'casing and extends under rollerson the two slots. The two slotsare maintained covered irrespectivefofthe 'vertical' move# nect'ed to the casing at one endof thecasing VVslotmeans of a` spring vmember so as to maintain astr'ip tautulnder all working conditions,y

Otherobjects andadvantagesvvill bein Y radial arm overlrollers onfthe dri-lf'lhead in such manner as to completely"y cover the partindicated inthe followingzdescription l' j andin part rendered apparent therefrom in connection vwith the? annexed- .drawings..

T05: enable others skilled fin-the artA so fullyV vto-a'ipprehend "the underlyingy .features a part of thisy disclosure and,`in'f fsuch drawings, like charactersof reference denote cor- `hereof that-they 'may embody the''samefin the various waysccoiitemplatedby this `inv f Vtveiition,j drawings depicting a' preferred typieal `construction have been 'aniiexed as In. the accompanying drawiiig, Figure l l is an elevational View of ya radial drilling machine having the. shafts thereof protected lin accordance `Vwith/my invention. Fig f2" isan end view;oftlie radiall arm shown `in Referring to thegdrawing, sleeve inember l, vwhichis mountedfon a, post or ycoluinn2, supports Va radialar'm, rI he sleeve member is rotatable onthe .postiZfin the sa Fig. lxofthedravving.jFig.` 3 isza sectional customaryl manner" and p the 4v arm 3 is -'vertically adjustableV on the; sleevemember 1. A tool head 4, which vcarries a suitable drilling tool (not shown),1is supported by and movable "onnthew 'radial arm 3. Th head 14 is' connected tof'an armfshaft by means of a shaftaand bevelled 'gear Wheels 7. ,The farm shaft' is 'located Within they j radial-arm 3 andzisoperatedby means -Aof which connects theatool kheadft 4 with the arm shaft 5, extends through a s lot Swhich slot 8:'serves toftake Vcare of the shaft 6a ke tool l during the movement of the headi along the#V arm. One ofthe lmain feature of my. in-y vention is to maintain lthe slot onthe top.

of the radial arm covered at all times; dui-'- ing the operation'ofthe machina wheel 11 which meshes with a bevelled gear 12 which is'splined to the vertical driving shaft 6. The bevelled gear'wheel 12 is car- -V ried by a bracket 13 which projects from the end of the radial arm A3, as shown in Fig. 1. ofthe drawing. Preferably a casing 14, which is supported between brackets 15 and 16 on the sleeve member 1, is Vprovided for enclosing the vertical driving shaft 6. flow-V ever, it is necessary to form a slot 17 in the casing 14 in order to take care ofthe con-y nection between the arm` shaft 5 and the vertical driving shaft 6y during the vertical movement of the radial arm. The slot 17 formed in the casing 14' leaves the vertical drivingshaft exposed on one Yside thereof.

The vertical driving shaft 6 is operated by suitable gearing 19 located inthe top of the sleeve member 1, as shown in Fig. 1 of the drawing. The gearing 19 also serves to operate ay shaft 2O for controlling the vertical movement of the radial arm 3 on the i sleeve member. Suitable means may be provided for operatingthe gearing 19 by means of a main driving shaft y19a which is located withinr the post or column 2. Iliasmuch as my invention is not particularly related to the specic driving means for the radial drill a further description thereof is deemed unnecessary. A` flexible ystrip 24, which, may be composed of metal or fabric or any other suitable material is provided for coveringthe slot 17 in the casing 14 and for covering the slot 8 in the radial arm 3. V.Oneend of the flexible strip 24is secured to the bracket 15 near the upper end of the slot 17 in the. casf ing 14. The strip `extends from the upper end of the slotalong the casing and around a roller 25 on the end of the arm 3 adjacent to the casing. Such portion ofthe strip serves to cover the upper end of the slot 17. The strip 24 extends along the slot 3 in the arm 3 to a roller 26v which is mounted on the drill head 4. In order to cover the slot 8 on the other side of the head 4, the strip 24 is carried over two rollers 27 and 28 located at the top of the head 4 and' under a roller 29 which is located on the lower part of the head adjacent to the slot. From the roller 29, Vthe strip 24`is carried along the slot 8 to rollers 30 and 31 which are located Y at the end of the radial arm 3. After passing over the two rollers 30 and 31 the strip the strip 24 in position over the slot 8 during the movement of the head along the arm irrespective ofthe position of the head and of the Vmovement of the head along the arm 3. rilhe rollers 26 and 29 hold the strip 24 in position to cover the parts of the slot 3 which otherwise would be exposed.V Thus it is apparentv a single flexible strip is prof vided for covering the slot in the casingv and the slot in the radial arm irrespective of the Vmovement of the head andy irrespective of the movement of the radial arm, AAlthough the strip 24 is'shown connected to the brackets 15 and 16, which support the casing 14, is is to be understood that the ends of the strip may be connected directly tc the casing 14 if so desired. v l/Vithout further analysis, the foregoing will so fully reveal the gist of this invention that others can by applying current knowledge, readily adapt'it for various utilizations by retaining one ormore of the features that, from the standpoint of the prior art, fairly constitutepessential characteristics of either the generic orspeciiicaspects of this invention and, therefor, such adapta-- tions should be, and are intended to be, coniprehended within the meaning and range of equivalency of the following claiinsz- Having thus revealed this invention, l

claim as new and desire to secure the following combinations and elements7 or equivir lents thereof, by Letters Patent of the United States: l

1. In a machine tool, theI combination comprising an elongated member vhaving a slot formedy ther-ein; a sliding mechanism movable along the elongated member and vprojecting through the slot into theelongated member ;A and means comprising a f eXib-le strip connected to the elongated member at each end of the slot therein and arranged to cover such slot on each side of iis the mechanism irrespective of the movement of the sliding mechanism along the elon-4l` gated member.

2. In a machine tool, the combination coinprising an elongated member having a slotV `formed therein; `a sliding mechanism movable along thevv elongated member and projecting through the slot into the elongated member; means comprising a flexiblestrip connected to the elongated member at each end ofthe slot therein and arranged to extend around said slidingy mechanism and .to cover suoli slot kon each side of the sliding mechanism irrespective of the movement of 4to" gatedmember; means to hold said strip con'- the sliding mechanism along the 'elongated' member; and resilient-'means s0 connected to one end ofthe exible strip as to *maintain it taut.r Y, 1

3. In a machine tool, the combination comprising an elongated member having va slotl formed therein; mechanism comprising tinuou'slyV proximity to the Yslotjin the arm Y at opposite" sides yof said'l opera-ting member as said member Iis moved along said i 4.' In la machine tool, the combination comprisingan elongated member having a slot'formed therein; mechanism comprising an arm movable along the elongatedl mem.

ber and projecting through said slot into the member7 said arm having a slot formed therein transverse to the slotin said elon gatedivmember; 'an operating member movable along the'arm and projecting through the arm'slot intorlthe arm; a flexible strip connected to ysaid elongated member atveach end of the slott-herein and having its intermediate yportion extendingabout said arm lengthvvisethei'eof; guides adapted' to hold said.' strip adjacentthe slot in said elontinuouslv yin proximity to the slot in the arm l at opposite sides of said operating member u, stripformaintaining it taut.

as' saidrmember is moved along said arm;-

and resilient means acting upon the flexible V5.' In a machinertool, the gconibination Vcomprising an elongated memberhaviiiga slot formed therein mechanism comprising van 'arm Vmovable along the elongated mem- ,beraiid projecting through the slot into the member; said varm having av slot formed therein; an operating member movable along Athe arm and projectingthroughthe slot into the arm; and means comprising -a' flexibler. ystriprforY covering' the slot onV each side. ofv the varm and 'for covering the arm fslot on f veachv side of the operating member irrespective of the movement of the arm or of the movement of the operating member. i

v6. In a machine tool, the combination comprising an elongated member having a longitudinal slot formed therein; a rotating shaft mounted in said elongated meinber; a sliding member movable along thev elongated member; a shaft mounted in said sliding memberiand connectedtosaid.l roi-lk tating rshaft',`the shaft inssaid sliding member projecting thru the slot in-said elongated member; anda single" flexible strip extendingv along the slot and around the sliding member for coveringfthe'slot on 'each side Vof the* sliding member V'irrespective :of the lnim'renient-jof the sliding member; f

A7. ln amachline tool, the combination comprisingV an elongated member "havingfla longitudinal slot formed therein; rotating shaft mounted in said elongatedinember; a sliding member movable` along-the i elongated member a Vshaft mounted in l*said sliding member land connected'to said"ro tating sliaft,the shaft in 'said sliding member' projecting through tlieslot in said elon gate'dfmember; la lsingle Yflexible strip eX? tending along the slot' and around the sliding member for covering the slot `on each side of the sliding member irrespective of the movement ofthe "sli-dingkmember;and

yresilient means for maintaining the strip taut.

8:` Inga(v -radial drilling machine, the coni-4 'head mounted 'to have.. sliding movement `on the radial farm; an `arm` 'shaft mounted in said arm; means 'comprising apshaft mounted 'non the. head andi' projecting 95' through a slot in the arm for connecting vthe head to the'l arm shaft; 'Yandfafflexible lstrip extending "along the slot on eaclisi'de fof the head and around the head to cover the slot irrespectiveof the movement the vheadfalong ther arm.

'9, In. a. rad'al drilling machine; the combination comprising a radial arm;f a tool head mounted toliave sliding niovementon v the radyial'armf';anfarm shaft mounted in said *fa-rm; kmeans ."c'ompri'singlfa l shaft mounted on thefhead'A Aandi projecting through a j-s'lotfl in the arm -for connecting vthe head tofthearm shaft; a flexible strip 'connected atlv its opposite ends toV thedrill-l ing vmachine' and extending along'the slot on each side of Athe head and-around the head i tovv cover the vslot 1'irrespective fof-"the Ymovement ofthe head along ytheaim; anda resilient member connected to'thes'tripfor ,maintaining -it taut.

10. Ina; radial drillingfmachne, thevcomy'bination -comprising;'aA rotatable sleeveya radial armmountedto have sliding -movement on ,said`V sleeve; atool heady "mounted vertical driving --shaft` ,mounted on said sleeve; an armshaft mountedon said arm and connected to'said vertical driving shaft; a casing surroundingsaid vertical' 'shaft' and having a` slot formed therein, said slot 'to have sliding movement` onsaid arm;fa

takingvcare of the arm. connection to the vertical shaft during the vertical movement of the arm; alrslot formed in the arm to .permit 'aconnection between the head and 130 Y the armshaft; a single flexible strip havingr its ends secured to 'said casing at opposite ends of the slot therein and its intermediate portion extendingabout said arm lengthwise thereof-andmeans to hold said strip lagainst transverse `faces of said casing and arm for covering the slot on both sides of the arm and for covering the slot on bothv sidesfof the tool head irrespective of the movement of the arm and of the tool head,

11.In a radial drilling machine, the combination comprising a rotatable sleeve; a radial arm mounted to have sliding movement on said sleeve; a tool head mounted to have slidingmovement on said arm; a vertical driving'shaft mounted on said sleeve; an :arm shaft mounted on said arm 'and /conneoted to said vertical driving shaft;

a casing surrounding said vertical shaft and having a slot formedtherein, said slot takingv care of the arm connection to the vertical shaft during the vertical movement of the arm; a slot formed inthe arm to permit a connection between the head and the arm shaft; a single ilexiblestrip connected to said casing at opposite ends of the slot in the casing and extending along that portion of the slot in the casing above said arm; guides directing the y,strip .lengthwise of the armv overthe slot therein, around the toolV head and backA tosaid casing beneath said arm; and means to hold the strip vover that portion of the slot in the casing beneath the arm. A' I 12. In a radial drilling machine, the combination comprising a rotatable sleeve; a radial arm .mounted to have sliding movenient on said sleeve; a tool head mounted to have sliding movement on said arm; a vertical driving shaft lmounted on said sleeve; an arm' shaft Amounted on said arm and connected to saidl vertical driving shaft; a casing surrounding said vertical shaft and V having a slot formed therein, said slot taking careof the arm connection tothe vertical shaft during the vertical movement of the arm; a slot formed in the arm to permit a connectionbetween .the head and the arm shaft; a single flexibleA strip connectedrat one end-ofthe casing slot and extending along the slot in the casing. and in the arm and around the tool head and the arm to the other end of the casing slotV for covering the `two-,slots irrespective of the movement 'ol' the arm and ofl the tool head; anda resilient member connected lto one end of the strip for maintaining it taut. y

13min a radial drill, in combination, a radial arm providing a housing having a slot through a rWall thereof;.atool headizslidg-V ablyV mounted on the' radialy arm; awsha'ft journaled vlength-wise of said arm vwithin said housing; operating mechanism exten-ding through said slot and slidably connected with sai-.div shaft; a single liexible guard extending lengthwise of said armand adapted to cover lsaid slotat opposite sides of said tool head; means at opposite ends of said arm to maintain said flexible guard in proximity to said slot; rollers `located at opposite sides of said tool head and acting upon said guard to `maintain it in proxim-V ity to said-slot adjacent the tool head; and means to guide said guard around saidtool head from one of said rollers to the other.` 14. In a radial drill, in combination, a sleeve; av radial-arm carried by said sleeve and providing a housing havingfa slot through one'wall thereofja drill-headtranslatably mounted on the radial arm and having a portion overlying said slot; a shaftA journaled lengthwise of said arm within said housing; means connected with said arm shaft and extending through said slot to transmit power from said shaft into said drill-head; a flexible guard extending lengthwise of said arm; guide members at opposite ends'of said slot to hold said guardl in proximity to saidslot; and means carried by said drill-headv to deflect saidguard member aro-und said Vdrill-head to permit said drill-head to beshifted relatively to said guard and to maintain the guard in Vproximity/to the slot immediately yadjacent opposite sides of said drill-head.l

15.*,A raidal drill combining a column; an

arm extending radially from said column and provided with a casing having a 'slot in one wall thereof; a drill head rtransllatably mounted on the arm and having a portion overlying said slot; a shaft journaled lengthwise of said arm Within said casing; means slidably connected with said arm shaft and extending through said slot to transmit power from saidl shaft into said drill-head; a flexible guard having a portion'extending lengthwise ofsaid arm to close said slot; guide means adjacent opposite ends of said arm to hold said guard in proximity to said slot; means carried' by said drill-head to hold said guard in kproximity to saidv slot at Op-l posite sides of said drill-head; means to guide the guard around said drill-head; and means for maintaining said guardtaut along said Varm and around saidv drill-head.

scribed my name.

LAWRENCE LEE scHAUnR.

sin 

